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- Title
Wideband low cost planar mono-pulse comparator circuit.
- Authors
Ghaffarian, Mohammad Saeid; Honari, Mohammad Mahdi; Khajepour, Somayeh; Moradi, Gholamreza; Shamaiee, Mehran
- Abstract
A novel wideband planar single layer mono-pulse comparator for the application of mono-pulse angle of arrival and target detecting is presented. This low cost comparator consists of three new broadband differential phase shifters and four 3 dB hybrid commercial couplers to generate sum and delta (difference) output channel frequency response. The operating frequency ranges in S band over one octave from 2 to 4 GHz. The comparator circuit is designed and fabricated on single layer RO4003C microstrip board with the simple and low cost PCB process. The amplitude imbalance and phase shift ripple between the four input channels and two sum and delta output channels are <1 dB and 2.5°, respectively. By integrating a four-arm spiral antenna and the proposed comparator, a mono-pulse antenna is designed and fabricated. In the frequency range from 2 to 4 GHz, the sidelobe level is ≤17 dB, the sum gain is measured as >3 dBic, and the null depth is better than 25 dB. The obtained sum and difference radiation characteristics make the proposed mono-pulse antenna promising for target detecting and tracking in the two dimension applications.
- Subjects
BROADBAND communication systems; COMPARATOR circuits; PHASE shifters; SPIRAL antennas; TRACKING algorithms
- Publication
IET Microwaves, Antennas & Propagation (Wiley-Blackwell), 2017, Vol 11, Issue 12, p1726
- ISSN
1751-8725
- Publication type
Article
- DOI
10.1049/iet-map.2016.0927